Response to TMax 400 and HC110- dilution? time?

Asher, what you will learn from the BTZS approach is that the manufacturers reccomendations are correct "if" you want negatives that have a characteristic curve that is the ISO standard. That is where you have to make a decision. I started out using Adams' testing procedures and they are fine but finding Normal make take several trys and if you are impatient like me, I want to test once and be done with it. I am speaking for sheet film. With roll film I have always used the manufacturers starting point or if you look at the data sheets it will show how to alter development to arrive at various gradients. Accuracy of equipment such as your thermometer is very important, a 10 degree variation with T-Max will not give satisfactory results unless you are just lucky. Give the book a look.

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